Greek Turkey Sliders

Name: Greek Turkey Sliders
Ingredients: 1 slice of bread, torn in small pieces; 2 tablespoons milk; 11/3 pounds ground turkey; ⅓ cup crumbled feta cheese; ¼ cup finely chopped onion; 2 tablespoons chopped fresh oregano or 2 teaspoons dried oregano; ½ teaspoon salt; ¼ teaspoon pepper; ½ cup finely chopped cucumber; 1 cup plain yogurt; 1 tablespoon chopped fresh oregano or 1 teaspoon dried oregano; 1 teaspoon lemon juice; Salt; Pepper; 6 pitas, cut in half; Tomato slices; Onion slices; Cucumber slices; Mixed greens